[Clyde Lovellette was considered one of the NBA’s top centers in the 1950s. Make that, one of its top-scoring young big men. “He is not as fast as the Pistons’ Walter Dukes,” quipped a reporter, “not the rebounding or defensive equal of the Celtics’ Bill Russell, not as agile as the Hawks’ Bob Pettit, and he lacks the muscular strength of the Lakers Lar…